RadioBanter - View Single Post

June 14th 04, 02:51 PM

wrote in message ...
Hello. Im about 1/2 way through building the simple superhet rx in
doug demaws qrp notebook. (The brown covered one).
It uses a ca3028 mixer ic followed by a crystal filter and 1350 if
amps. Far Circuits sells a circuit board (which i purchased).
the main board is compact..about 4 inches by 3 inches.
Covers just one band..but you can use external converters to cover
other bands.
Let me know ..i could send you some info..jpg files i could scan.
Another good rcvr is the one in the ARRL handbooks ..it uses dual gate
mosfets ..I think its in the early 1990s handbooks.
73 Earl VE3AB

Hi Earl,
good luck with the project - not familiar with that one. One query -
can you or have you sourced the ic's - I think they are long obselete
(could be wrong) - its a worry with old designs.....
73 de VK3BFA Andrew

ps - currently building the Ashar Farhan BITX20 20m ssb transceiver -
a lovely design, absolute miminal implementation of a complex device.